Originally Posted by
PizzaSHARK
Never engage them in a straight fight. Jump in, pound them while they're stunned/disarmed/throwing their keyboard out a window, and then LOS them around a pillar to restealth and do it again once DR timers have reset. You will lose a straight fight against a tank. Kite, kite, kite. Even if you can't restealth, just LOS them in circles around a pillar and let Recuperate do its thing. Never, ever try to fight a Blood DK straight up, especially not after their Death Strike buff. You will lose, and lose badly. You might be able to beat a Protection Warrior straight up if all his cooldowns are down and you're luckier than he is with avoidance RNG.
You can dispel Vengeance with Shiv. You will need a dagger for this. You should use daggers anyway, though.
Basically, your MO as Sub against any non-squishy target is to zip in, pound them while Find Weakness is up and they're stunned/disarmed, and then get the fuck out of there once Find Weakness/CC is over, restealth, and repeat the process until they're dead.
It's overpowered and ridiculously frustrating to fight against, and ridiculously fun to do. You can almost hear their screams of nerdrage from here.